You must include maps, plans, and diagrams showing the drainage for the entire site. This includes:
You also need all related infrastructure to the stormwater management facilities. This includes:
You must show any connection points to the City of Minneapolis stormwater system.
You must provide modeling and calculations to prove that credit criteria are met.
Provide water quality model inputs and results using one of these models:
Provide rate control credit model inputs and results using one of these models:
Provide the calculation in conjunction with HydroCAD.
You need to include pollution prevention practices for the properties, such as covering material storage areas.
You must provide a basic SMP.
If you are applying for the advanced SMP credit type, you must provide an advanced SMP. This is separate from the basic SMP. This must show that winter maintenance practices are reducing or ending salt use in applicable areas.
| Credit type | Description | % of stormwater charge | Applied to |
|---|---|---|---|
| Chapter 54 | Meet the minimum standards for water quality treatment, peak discharge rate control, and volume control of Chapter 54 as a part of development approval. | 10% | Property area meeting the standard. |
| Advanced salt management plan (SMP) | Implement a SMP that demonstrates winter management salt reduction. | Up to 30% | Portions of property where winter site management is required. |
| Voluntary/unregulated |
Voluntary BMPs (not required as a part of development) meeting water quality treatment, peak discharge rate control, and volume control standards as outlined in Chapter 54. Water quality treatment: remove at least 75% of the total phosphorus (TP) on an average annual basis. |
Up to 30% | Property area meeting the standard. |
| Above and beyond (20%) | Volume reduction: Capture and retain on-site 2.0” of runoff from impervious surfaces. | 20% | Property area meeting the standard. |
| Above and beyond (60%) | Peak discharge rate control: Maintain peak discharge rates at or below the pre-settlement rates for the 10-, and 100-year storm events. | 60% | Property area meeting the standard. |
| Equity | Credit added for implementing stormwater best management practices on properties located in Green Zones. | 10% | Property area meeting the standard. |
